Dometic FreshJet 5 Evaporator Cover Kit with Foam

The evaporator cover is one of those parts nobody thinks about until it's cracked, warped, or sitting in a box of pieces after a rooftop service. This kit puts it right. It's the genuine Dometic evaporator cover for the FreshJet 5 Series air conditioner, and Dometic ships it with the foam, so you're not hunting down gasket material separately.

Here's what this piece actually does. Inside a FreshJet 5, the evaporator is the cold coil that pulls heat and humidity out of your cabin air. The cover sits over that coil section and channels the airflow the way the unit was engineered to move it. The foam seals the cover against the chassis so air can't sneak around the coil instead of through it. When that seal is broken, a chunk of your return air bypasses the cold coil and comes back out barely cooled. You feel it as weak cooling, longer run times, and a compressor that never seems to catch up.

So if your FreshJet 5 suddenly isn't blowing as cold as it used to and the coil looks clean, a missing or crushed evaporator cover, or foam that's gone hard and fallen away, is worth checking before you start suspecting the compressor or a refrigerant issue. It's a cheap part that has an outsized effect on how well the whole unit performs.

The FreshJet 5 is Dometic's low-profile rooftop air conditioner, the one a lot of folks are putting on as a direct replacement for the older Penguin II. Because this cover kit is the factory Dometic part matched to that unit, it drops into the exact mounting points and airflow path the FreshJet 5 was built around. No trimming, no shimming, no fighting a universal part into place. That fitment matters more than it sounds. A cover that doesn't seat flat leaves gaps, and gaps mean the same bypass problem you were trying to fix.

Who needs this? A few groups. RV techs doing a rebuild or a warranty swap who need the correct service part. Owners who cracked the original cover pulling the shroud for a coil cleaning, which happens more than you'd think when the plastic is cold and brittle. And anybody who bought a used rig where a previous owner was into the unit and left the foam behind. If any of that is you, this is the right box.

Install is straightforward for anyone comfortable working inside a rooftop unit. You'll pull the interior ceiling assembly or the exterior shroud to reach the evaporator section, set the old cover aside, lay in the new foam the way it seats, and drop the cover onto its mounting points. Take your time getting the foam seated cleanly, since that seal is the whole point of the part. Kill power to the unit at the breaker before you start, and you're working with your hands, not tools, for most of it.

We push genuine Dometic parts on jobs like this for a reason. Aftermarket covers and generic foam exist, but the FreshJet 5 airflow path is tuned around the factory geometry, and a close-enough cover that flexes or a foam that's the wrong thickness quietly costs you cooling performance you paid for. This is the part Dometic specifies, carrying the Dometic part number 4450037551, so there's no cross-referencing or guesswork about whether it belongs on your unit.

One honest note. This is a component, not a whole air conditioner and not a shroud. It's the internal evaporator cover with its foam. If you're looking for the outer aerodynamic shroud, the ceiling assembly, or the full unit, those are separate parts. But if the evaporator cover is what failed, this is exactly what you want, and buying the genuine Dometic kit means it fits the FreshJet 5 the first time.